Data processor which accesses a second memory while responding t

Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output addressing

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710 3, 710266, 710269, 711103, 712 2, G06F 1300, G06F 922

Patent

active

061417009

ABSTRACT:
To obtain a correct vector address even if an interrupt occurs during erasing or programing of the data in a built-in ROM 18 by moving a part of a built-in RAM13 to a vector address area by a bus controller 27. Thereby, a microcomputer is prevented from running away and the safety of a system is improved at the time of on-board programming of the built-in ROM 18.

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patent: 5881295 (1999-03-01), Iwata

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